[deliverable/linux.git] / drivers / hwmon / adm1021.c

/*
    adm1021.c - Part of lm_sensors, Linux kernel modules for hardware
		monitoring
    Copyright (c) 1998, 1999  Frodo Looijaard <frodol@dds.nl> and
    Philip Edelbrock <phil@netroedge.com>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/err.h>
#include <linux/mutex.h>


/* Addresses to scan */
static unsigned short normal_i2c[] = { 0x18, 0x19, 0x1a,
					0x29, 0x2a, 0x2b,
					0x4c, 0x4d, 0x4e,
					I2C_CLIENT_END };

/* Insmod parameters */
I2C_CLIENT_INSMOD_8(adm1021, adm1023, max1617, max1617a, thmc10, lm84, gl523sm,
			mc1066);

/* adm1021 constants specified below */

/* The adm1021 registers */
/* Read-only */
#define ADM1021_REG_TEMP		0x00
#define ADM1021_REG_REMOTE_TEMP		0x01
#define ADM1021_REG_STATUS		0x02
/* 0x41 = AD, 0x49 = TI, 0x4D = Maxim, 0x23 = Genesys , 0x54 = Onsemi */
#define ADM1021_REG_MAN_ID		0xFE
/* ADM1021 = 0x0X, ADM1023 = 0x3X */
#define ADM1021_REG_DEV_ID		0xFF
/* These use different addresses for reading/writing */
#define ADM1021_REG_CONFIG_R		0x03
#define ADM1021_REG_CONFIG_W		0x09
#define ADM1021_REG_CONV_RATE_R		0x04
#define ADM1021_REG_CONV_RATE_W		0x0A
/* These are for the ADM1023's additional precision on the remote temp sensor */
#define ADM1023_REG_REM_TEMP_PREC	0x10
#define ADM1023_REG_REM_OFFSET		0x11
#define ADM1023_REG_REM_OFFSET_PREC	0x12
#define ADM1023_REG_REM_TOS_PREC	0x13
#define ADM1023_REG_REM_THYST_PREC	0x14
/* limits */
#define ADM1021_REG_TOS_R		0x05
#define ADM1021_REG_TOS_W		0x0B
#define ADM1021_REG_REMOTE_TOS_R	0x07
#define ADM1021_REG_REMOTE_TOS_W	0x0D
#define ADM1021_REG_THYST_R		0x06
#define ADM1021_REG_THYST_W		0x0C
#define ADM1021_REG_REMOTE_THYST_R	0x08
#define ADM1021_REG_REMOTE_THYST_W	0x0E
/* write-only */
#define ADM1021_REG_ONESHOT		0x0F


/* Conversions. Rounding and limit checking is only done on the TO_REG
   variants. Note that you should be a bit careful with which arguments
   these macros are called: arguments may be evaluated more than once.
   Fixing this is just not worth it. */
/* Conversions  note: 1021 uses normal integer signed-byte format*/
#define TEMP_TO_REG(val)	SENSORS_LIMIT((val) / 1000, -128, 127)

/* Initial values */

/* Note: Even though I left the low and high limits named os and hyst,
they don't quite work like a thermostat the way the LM75 does.  I.e.,
a lower temp than THYST actually triggers an alarm instead of
clearing it.  Weird, ey?   --Phil  */

/* Each client has this additional data */
struct adm1021_data {
	struct i2c_client client;
	struct device *hwmon_dev;
	enum chips type;

	struct mutex update_lock;
	char valid;		/* !=0 if following fields are valid */
	unsigned long last_updated;	/* In jiffies */

	s8	temp_max;	/* Register values */
	s8	temp_hyst;
	s8	temp_input;
	s8	remote_temp_max;
	s8	remote_temp_hyst;
	s8	remote_temp_input;
	u8	alarms;
        /* Special values for ADM1023 only */
	u8	remote_temp_prec;
	u8	remote_temp_os_prec;
	u8	remote_temp_hyst_prec;
	u8	remote_temp_offset;
	u8	remote_temp_offset_prec;
};

static int adm1021_attach_adapter(struct i2c_adapter *adapter);
static int adm1021_detect(struct i2c_adapter *adapter, int address, int kind);
static void adm1021_init_client(struct i2c_client *client);
static int adm1021_detach_client(struct i2c_client *client);
static struct adm1021_data *adm1021_update_device(struct device *dev);

/* (amalysh) read only mode, otherwise any limit's writing confuse BIOS */
static int read_only;


/* This is the driver that will be inserted */
static struct i2c_driver adm1021_driver = {
	.driver = {
		.name	= "adm1021",
	},
	.id		= I2C_DRIVERID_ADM1021,
	.attach_adapter	= adm1021_attach_adapter,
	.detach_client	= adm1021_detach_client,
};

#define show(value)							\
static ssize_t show_##value(struct device *dev,				\
			    struct device_attribute *attr, char *buf)	\
{									\
	struct adm1021_data *data = adm1021_update_device(dev);		\
	return sprintf(buf, "%d\n", 1000 * data->value);		\
}
show(temp_max);
show(temp_hyst);
show(temp_input);
show(remote_temp_max);
show(remote_temp_hyst);
show(remote_temp_input);

static ssize_t show_alarms(struct device *dev,
			   struct device_attribute *attr,
			   char *buf)
{
	struct adm1021_data *data = adm1021_update_device(dev);
	return sprintf(buf, "%u\n", data->alarms);
}

#define set(value, reg)							\
static ssize_t set_##value(struct device *dev,				\
			   struct device_attribute *attr,		\
			   const char *buf, size_t count)		\
{									\
	struct i2c_client *client = to_i2c_client(dev);			\
	struct adm1021_data *data = i2c_get_clientdata(client);		\
	long temp = simple_strtol(buf, NULL, 10);			\
									\
	mutex_lock(&data->update_lock);					\
	data->value = TEMP_TO_REG(temp);				\
	if (!read_only)							\
		i2c_smbus_write_byte_data(client, reg, data->value);	\
	mutex_unlock(&data->update_lock);				\
	return count;							\
}
set(temp_max, ADM1021_REG_TOS_W);
set(temp_hyst, ADM1021_REG_THYST_W);
set(remote_temp_max, ADM1021_REG_REMOTE_TOS_W);
set(remote_temp_hyst, ADM1021_REG_REMOTE_THYST_W);

static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max, set_temp_max);
static DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_hyst, set_temp_hyst);
static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input, NULL);
static DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_remote_temp_max, set_remote_temp_max);
static DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_remote_temp_hyst, set_remote_temp_hyst);
static DEVICE_ATTR(temp2_input, S_IRUGO, show_remote_temp_input, NULL);
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);


static int adm1021_attach_adapter(struct i2c_adapter *adapter)
{
	if (!(adapter->class & I2C_CLASS_HWMON))
		return 0;
	return i2c_probe(adapter, &addr_data, adm1021_detect);
}

static struct attribute *adm1021_attributes[] = {
	&dev_attr_temp1_max.attr,
	&dev_attr_temp1_min.attr,
	&dev_attr_temp1_input.attr,
	&dev_attr_temp2_max.attr,
	&dev_attr_temp2_min.attr,
	&dev_attr_temp2_input.attr,
	&dev_attr_alarms.attr,
	NULL
};

static const struct attribute_group adm1021_group = {
	.attrs = adm1021_attributes,
};

static int adm1021_detect(struct i2c_adapter *adapter, int address, int kind)
{
	int i;
	struct i2c_client *client;
	struct adm1021_data *data;
	int err = 0;
	const char *type_name = "";
	int conv_rate, status, config;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
		pr_debug("adm1021: detect failed, "
			 "smbus byte data not supported!\n");
		goto error0;
	}

	/* OK. For now, we presume we have a valid client. We now create the
	   client structure, even though we cannot fill it completely yet.
	   But it allows us to access adm1021 register values. */

	if (!(data = kzalloc(sizeof(struct adm1021_data), GFP_KERNEL))) {
		pr_debug("adm1021: detect failed, kzalloc failed!\n");
		err = -ENOMEM;
		goto error0;
	}

	client = &data->client;
	i2c_set_clientdata(client, data);
	client->addr = address;
	client->adapter = adapter;
	client->driver = &adm1021_driver;
	status = i2c_smbus_read_byte_data(client, ADM1021_REG_STATUS);
	conv_rate = i2c_smbus_read_byte_data(client,
					     ADM1021_REG_CONV_RATE_R);
	config = i2c_smbus_read_byte_data(client, ADM1021_REG_CONFIG_R);

	/* Now, we do the remaining detection. */
	if (kind < 0) {
		if ((status & 0x03) != 0x00 || (config & 0x3F) != 0x00
		    || (conv_rate & 0xF8) != 0x00) {
			pr_debug("adm1021: detect failed, "
				 "chip not detected!\n");
			err = -ENODEV;
			goto error1;
		}
	}

	/* Determine the chip type. */
	if (kind <= 0) {
		i = i2c_smbus_read_byte_data(client, ADM1021_REG_MAN_ID);
		if (i == 0x41)
			if ((i2c_smbus_read_byte_data(client,
					ADM1021_REG_DEV_ID) & 0xF0) == 0x30)
				kind = adm1023;
			else
				kind = adm1021;
		else if (i == 0x49)
			kind = thmc10;
		else if (i == 0x23)
			kind = gl523sm;
		else if ((i == 0x4d) &&
			 (i2c_smbus_read_byte_data(client,
						   ADM1021_REG_DEV_ID) == 0x01))
			kind = max1617a;
		else if (i == 0x54)
			kind = mc1066;
		/* LM84 Mfr ID in a different place, and it has more unused bits */
		else if (conv_rate == 0x00
			 && (kind == 0 /* skip extra detection */
			     || ((config & 0x7F) == 0x00
				 && (status & 0xAB) == 0x00)))
			kind = lm84;
		else
			kind = max1617;
	}

	if (kind == max1617) {
		type_name = "max1617";
	} else if (kind == max1617a) {
		type_name = "max1617a";
	} else if (kind == adm1021) {
		type_name = "adm1021";
	} else if (kind == adm1023) {
		type_name = "adm1023";
	} else if (kind == thmc10) {
		type_name = "thmc10";
	} else if (kind == lm84) {
		type_name = "lm84";
	} else if (kind == gl523sm) {
		type_name = "gl523sm";
	} else if (kind == mc1066) {
		type_name = "mc1066";
	}
	pr_debug("adm1021: Detected chip %s at adapter %d, address 0x%02x.\n",
		 type_name, i2c_adapter_id(adapter), address);

	/* Fill in the remaining client fields */
	strlcpy(client->name, type_name, I2C_NAME_SIZE);
	data->type = kind;
	mutex_init(&data->update_lock);

	/* Tell the I2C layer a new client has arrived */
	if ((err = i2c_attach_client(client)))
		goto error1;

	/* Initialize the ADM1021 chip */
	if (kind != lm84 && !read_only)
		adm1021_init_client(client);

	/* Register sysfs hooks */
	if ((err = sysfs_create_group(&client->dev.kobj, &adm1021_group)))
		goto error2;

	data->hwmon_dev = hwmon_device_register(&client->dev);
	if (IS_ERR(data->hwmon_dev)) {
		err = PTR_ERR(data->hwmon_dev);
		goto error3;
	}

	return 0;

error3:
	sysfs_remove_group(&client->dev.kobj, &adm1021_group);
error2:
	i2c_detach_client(client);
error1:
	kfree(data);
error0:
	return err;
}

static void adm1021_init_client(struct i2c_client *client)
{
	/* Enable ADC and disable suspend mode */
	i2c_smbus_write_byte_data(client, ADM1021_REG_CONFIG_W,
		i2c_smbus_read_byte_data(client, ADM1021_REG_CONFIG_R) & 0xBF);
	/* Set Conversion rate to 1/sec (this can be tinkered with) */
	i2c_smbus_write_byte_data(client, ADM1021_REG_CONV_RATE_W, 0x04);
}

static int adm1021_detach_client(struct i2c_client *client)
{
	struct adm1021_data *data = i2c_get_clientdata(client);
	int err;

	hwmon_device_unregister(data->hwmon_dev);
	sysfs_remove_group(&client->dev.kobj, &adm1021_group);

	if ((err = i2c_detach_client(client)))
		return err;

	kfree(data);
	return 0;
}

static struct adm1021_data *adm1021_update_device(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct adm1021_data *data = i2c_get_clientdata(client);

	mutex_lock(&data->update_lock);

	if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
	    || !data->valid) {
		dev_dbg(&client->dev, "Starting adm1021 update\n");

		data->temp_input = i2c_smbus_read_byte_data(client,
						ADM1021_REG_TEMP);
		data->temp_max = i2c_smbus_read_byte_data(client,
						ADM1021_REG_TOS_R);
		data->temp_hyst = i2c_smbus_read_byte_data(client,
						ADM1021_REG_THYST_R);
		data->remote_temp_input = i2c_smbus_read_byte_data(client,
						ADM1021_REG_REMOTE_TEMP);
		data->remote_temp_max = i2c_smbus_read_byte_data(client,
						ADM1021_REG_REMOTE_TOS_R);
		data->remote_temp_hyst = i2c_smbus_read_byte_data(client,
						ADM1021_REG_REMOTE_THYST_R);
		data->alarms = i2c_smbus_read_byte_data(client,
						ADM1021_REG_STATUS) & 0x7c;
		if (data->type == adm1023) {
			data->remote_temp_prec =
				i2c_smbus_read_byte_data(client,
						ADM1023_REG_REM_TEMP_PREC);
			data->remote_temp_os_prec =
				i2c_smbus_read_byte_data(client,
						ADM1023_REG_REM_TOS_PREC);
			data->remote_temp_hyst_prec =
				i2c_smbus_read_byte_data(client,
						ADM1023_REG_REM_THYST_PREC);
			data->remote_temp_offset =
				i2c_smbus_read_byte_data(client,
						ADM1023_REG_REM_OFFSET);
			data->remote_temp_offset_prec =
				i2c_smbus_read_byte_data(client,
						ADM1023_REG_REM_OFFSET_PREC);
		}
		data->last_updated = jiffies;
		data->valid = 1;
	}

	mutex_unlock(&data->update_lock);

	return data;
}

static int __init sensors_adm1021_init(void)
{
	return i2c_add_driver(&adm1021_driver);
}

static void __exit sensors_adm1021_exit(void)
{
	i2c_del_driver(&adm1021_driver);
}

MODULE_AUTHOR ("Frodo Looijaard <frodol@dds.nl> and "
		"Philip Edelbrock <phil@netroedge.com>");
MODULE_DESCRIPTION("adm1021 driver");
MODULE_LICENSE("GPL");

module_param(read_only, bool, 0);
MODULE_PARM_DESC(read_only, "Don't set any values, read only mode");

module_init(sensors_adm1021_init)
module_exit(sensors_adm1021_exit)
Commit	Line	Data
1da177e4 LT	1	/*
1da177e4 LT	2	adm1021.c - Part of lm_sensors, Linux kernel modules for hardware
c83c41e4	3	monitoring
1da177e4 LT	4	Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and
	5	Philip Edelbrock <phil@netroedge.com>
	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2 of the License, or
	10	(at your option) any later version.
	11
	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with this program; if not, write to the Free Software
	19	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	20	*/
	21
1da177e4 LT	22	#include <linux/module.h>
	23	#include <linux/init.h>
	24	#include <linux/slab.h>
	25	#include <linux/jiffies.h>
	26	#include <linux/i2c.h>
943b0830 MH	27	#include <linux/hwmon.h>
943b0830 MH	28	#include <linux/err.h>
9a61bf63	29	#include <linux/mutex.h>
1da177e4 LT	30
	31
	32	/* Addresses to scan */
	33	static unsigned short normal_i2c[] = { 0x18, 0x19, 0x1a,
	34	0x29, 0x2a, 0x2b,
c83c41e4	35	0x4c, 0x4d, 0x4e,
1da177e4	36	I2C_CLIENT_END };
1da177e4 LT	37
1da177e4 LT	38	/* Insmod parameters */
c83c41e4 KH	39	I2C_CLIENT_INSMOD_8(adm1021, adm1023, max1617, max1617a, thmc10, lm84, gl523sm,
c83c41e4 KH	40	mc1066);
1da177e4 LT	41
	42	/* adm1021 constants specified below */
	43
	44	/* The adm1021 registers */
	45	/* Read-only */
	46	#define ADM1021_REG_TEMP 0x00
	47	#define ADM1021_REG_REMOTE_TEMP 0x01
	48	#define ADM1021_REG_STATUS 0x02
c83c41e4 KH	49	/* 0x41 = AD, 0x49 = TI, 0x4D = Maxim, 0x23 = Genesys , 0x54 = Onsemi */
	50	#define ADM1021_REG_MAN_ID 0xFE
	51	/* ADM1021 = 0x0X, ADM1023 = 0x3X */
	52	#define ADM1021_REG_DEV_ID 0xFF
1da177e4 LT	53	/* These use different addresses for reading/writing */
	54	#define ADM1021_REG_CONFIG_R 0x03
	55	#define ADM1021_REG_CONFIG_W 0x09
	56	#define ADM1021_REG_CONV_RATE_R 0x04
	57	#define ADM1021_REG_CONV_RATE_W 0x0A
	58	/* These are for the ADM1023's additional precision on the remote temp sensor */
c83c41e4 KH	59	#define ADM1023_REG_REM_TEMP_PREC 0x10
	60	#define ADM1023_REG_REM_OFFSET 0x11
	61	#define ADM1023_REG_REM_OFFSET_PREC 0x12
	62	#define ADM1023_REG_REM_TOS_PREC 0x13
	63	#define ADM1023_REG_REM_THYST_PREC 0x14
1da177e4 LT	64	/* limits */
	65	#define ADM1021_REG_TOS_R 0x05
	66	#define ADM1021_REG_TOS_W 0x0B
	67	#define ADM1021_REG_REMOTE_TOS_R 0x07
	68	#define ADM1021_REG_REMOTE_TOS_W 0x0D
	69	#define ADM1021_REG_THYST_R 0x06
	70	#define ADM1021_REG_THYST_W 0x0C
	71	#define ADM1021_REG_REMOTE_THYST_R 0x08
	72	#define ADM1021_REG_REMOTE_THYST_W 0x0E
	73	/* write-only */
	74	#define ADM1021_REG_ONESHOT 0x0F
	75
	76
	77	/* Conversions. Rounding and limit checking is only done on the TO_REG
	78	variants. Note that you should be a bit careful with which arguments
	79	these macros are called: arguments may be evaluated more than once.
	80	Fixing this is just not worth it. */
	81	/* Conversions note: 1021 uses normal integer signed-byte format*/
c83c41e4	82	#define TEMP_TO_REG(val) SENSORS_LIMIT((val) / 1000, -128, 127)
1da177e4 LT	83
	84	/* Initial values */
	85
c83c41e4 KH	86	/* Note: Even though I left the low and high limits named os and hyst,
	87	they don't quite work like a thermostat the way the LM75 does. I.e.,
	88	a lower temp than THYST actually triggers an alarm instead of
1da177e4 LT	89	clearing it. Weird, ey? --Phil */
	90
	91	/* Each client has this additional data */
	92	struct adm1021_data {
	93	struct i2c_client client;
1beeffe4	94	struct device *hwmon_dev;
1da177e4 LT	95	enum chips type;
1da177e4 LT	96
9a61bf63	97	struct mutex update_lock;
1da177e4 LT	98	char valid; /* !=0 if following fields are valid */
	99	unsigned long last_updated; /* In jiffies */
	100
c83c41e4 KH	101	s8 temp_max; /* Register values */
	102	s8 temp_hyst;
	103	s8 temp_input;
	104	s8 remote_temp_max;
	105	s8 remote_temp_hyst;
	106	s8 remote_temp_input;
1da177e4	107	u8 alarms;
1da177e4 LT	108	/* Special values for ADM1023 only */
	109	u8 remote_temp_prec;
	110	u8 remote_temp_os_prec;
	111	u8 remote_temp_hyst_prec;
	112	u8 remote_temp_offset;
	113	u8 remote_temp_offset_prec;
	114	};
	115
	116	static int adm1021_attach_adapter(struct i2c_adapter *adapter);
	117	static int adm1021_detect(struct i2c_adapter *adapter, int address, int kind);
	118	static void adm1021_init_client(struct i2c_client *client);
	119	static int adm1021_detach_client(struct i2c_client *client);
1da177e4 LT	120	static struct adm1021_data adm1021_update_device(struct device dev);
	121
	122	/* (amalysh) read only mode, otherwise any limit's writing confuse BIOS */
02002963	123	static int read_only;
1da177e4 LT	124
	125
	126	/* This is the driver that will be inserted */
	127	static struct i2c_driver adm1021_driver = {
cdaf7934	128	.driver = {
cdaf7934 LR	129	.name = "adm1021",
cdaf7934 LR	130	},
1da177e4	131	.id = I2C_DRIVERID_ADM1021,
1da177e4 LT	132	.attach_adapter = adm1021_attach_adapter,
	133	.detach_client = adm1021_detach_client,
	134	};
	135
c83c41e4 KH	136	#define show(value) \
	137	static ssize_t show_##value(struct device *dev, \
	138	struct device_attribute attr, char buf) \
1da177e4 LT	139	{ \
1da177e4 LT	140	struct adm1021_data *data = adm1021_update_device(dev); \
c83c41e4	141	return sprintf(buf, "%d\n", 1000 * data->value); \
1da177e4 LT	142	}
	143	show(temp_max);
	144	show(temp_hyst);
	145	show(temp_input);
	146	show(remote_temp_max);
	147	show(remote_temp_hyst);
	148	show(remote_temp_input);
	149
c83c41e4 KH	150	static ssize_t show_alarms(struct device *dev,
	151	struct device_attribute *attr,
	152	char *buf)
	153	{
	154	struct adm1021_data *data = adm1021_update_device(dev);
	155	return sprintf(buf, "%u\n", data->alarms);
1da177e4	156	}
c83c41e4 KH	157
	158	#define set(value, reg) \
	159	static ssize_t set_##value(struct device *dev, \
	160	struct device_attribute *attr, \
	161	const char *buf, size_t count) \
	162	{ \
	163	struct i2c_client *client = to_i2c_client(dev); \
	164	struct adm1021_data *data = i2c_get_clientdata(client); \
5bfedac0	165	long temp = simple_strtol(buf, NULL, 10); \
c83c41e4 KH	166	\
	167	mutex_lock(&data->update_lock); \
	168	data->value = TEMP_TO_REG(temp); \
	169	if (!read_only) \
	170	i2c_smbus_write_byte_data(client, reg, data->value); \
	171	mutex_unlock(&data->update_lock); \
	172	return count; \
1da177e4 LT	173	}
	174	set(temp_max, ADM1021_REG_TOS_W);
	175	set(temp_hyst, ADM1021_REG_THYST_W);
	176	set(remote_temp_max, ADM1021_REG_REMOTE_TOS_W);
	177	set(remote_temp_hyst, ADM1021_REG_REMOTE_THYST_W);
	178
	179	static DEVICE_ATTR(temp1_max, S_IWUSR \| S_IRUGO, show_temp_max, set_temp_max);
	180	static DEVICE_ATTR(temp1_min, S_IWUSR \| S_IRUGO, show_temp_hyst, set_temp_hyst);
	181	static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input, NULL);
	182	static DEVICE_ATTR(temp2_max, S_IWUSR \| S_IRUGO, show_remote_temp_max, set_remote_temp_max);
	183	static DEVICE_ATTR(temp2_min, S_IWUSR \| S_IRUGO, show_remote_temp_hyst, set_remote_temp_hyst);
	184	static DEVICE_ATTR(temp2_input, S_IRUGO, show_remote_temp_input, NULL);
	185	static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1da177e4 LT	186
	187
	188	static int adm1021_attach_adapter(struct i2c_adapter *adapter)
	189	{
	190	if (!(adapter->class & I2C_CLASS_HWMON))
	191	return 0;
2ed2dc3c	192	return i2c_probe(adapter, &addr_data, adm1021_detect);
1da177e4 LT	193	}
1da177e4 LT	194
681c6f7a MH	195	static struct attribute *adm1021_attributes[] = {
	196	&dev_attr_temp1_max.attr,
	197	&dev_attr_temp1_min.attr,
	198	&dev_attr_temp1_input.attr,
	199	&dev_attr_temp2_max.attr,
	200	&dev_attr_temp2_min.attr,
	201	&dev_attr_temp2_input.attr,
	202	&dev_attr_alarms.attr,
	203	NULL
	204	};
	205
	206	static const struct attribute_group adm1021_group = {
	207	.attrs = adm1021_attributes,
	208	};
	209
1da177e4 LT	210	static int adm1021_detect(struct i2c_adapter *adapter, int address, int kind)
	211	{
	212	int i;
c83c41e4	213	struct i2c_client *client;
1da177e4 LT	214	struct adm1021_data *data;
	215	int err = 0;
	216	const char *type_name = "";
c83c41e4	217	int conv_rate, status, config;
1da177e4	218
c83c41e4 KH	219	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
	220	pr_debug("adm1021: detect failed, "
	221	"smbus byte data not supported!\n");
1da177e4	222	goto error0;
c83c41e4	223	}
1da177e4 LT	224
	225	/* OK. For now, we presume we have a valid client. We now create the
	226	client structure, even though we cannot fill it completely yet.
c83c41e4	227	But it allows us to access adm1021 register values. */
1da177e4	228
ba9c2e8d	229	if (!(data = kzalloc(sizeof(struct adm1021_data), GFP_KERNEL))) {
c83c41e4	230	pr_debug("adm1021: detect failed, kzalloc failed!\n");
1da177e4 LT	231	err = -ENOMEM;
	232	goto error0;
	233	}
1da177e4	234
c83c41e4 KH	235	client = &data->client;
	236	i2c_set_clientdata(client, data);
	237	client->addr = address;
	238	client->adapter = adapter;
	239	client->driver = &adm1021_driver;
	240	status = i2c_smbus_read_byte_data(client, ADM1021_REG_STATUS);
	241	conv_rate = i2c_smbus_read_byte_data(client,
	242	ADM1021_REG_CONV_RATE_R);
	243	config = i2c_smbus_read_byte_data(client, ADM1021_REG_CONFIG_R);
1da177e4 LT	244
	245	/* Now, we do the remaining detection. */
	246	if (kind < 0) {
c83c41e4 KH	247	if ((status & 0x03) != 0x00 \|\| (config & 0x3F) != 0x00
	248	\|\| (conv_rate & 0xF8) != 0x00) {
	249	pr_debug("adm1021: detect failed, "
	250	"chip not detected!\n");
1da177e4 LT	251	err = -ENODEV;
	252	goto error1;
	253	}
	254	}
	255
	256	/* Determine the chip type. */
	257	if (kind <= 0) {
c83c41e4	258	i = i2c_smbus_read_byte_data(client, ADM1021_REG_MAN_ID);
1da177e4	259	if (i == 0x41)
c83c41e4 KH	260	if ((i2c_smbus_read_byte_data(client,
c83c41e4 KH	261	ADM1021_REG_DEV_ID) & 0xF0) == 0x30)
1da177e4 LT	262	kind = adm1023;
	263	else
	264	kind = adm1021;
	265	else if (i == 0x49)
	266	kind = thmc10;
	267	else if (i == 0x23)
	268	kind = gl523sm;
	269	else if ((i == 0x4d) &&
c83c41e4 KH	270	(i2c_smbus_read_byte_data(client,
c83c41e4 KH	271	ADM1021_REG_DEV_ID) == 0x01))
1da177e4 LT	272	kind = max1617a;
	273	else if (i == 0x54)
	274	kind = mc1066;
	275	/* LM84 Mfr ID in a different place, and it has more unused bits */
c83c41e4 KH	276	else if (conv_rate == 0x00
	277	&& (kind == 0 /* skip extra detection */
	278	\|\| ((config & 0x7F) == 0x00
	279	&& (status & 0xAB) == 0x00)))
1da177e4 LT	280	kind = lm84;
	281	else
	282	kind = max1617;
	283	}
	284
	285	if (kind == max1617) {
	286	type_name = "max1617";
	287	} else if (kind == max1617a) {
	288	type_name = "max1617a";
	289	} else if (kind == adm1021) {
	290	type_name = "adm1021";
	291	} else if (kind == adm1023) {
	292	type_name = "adm1023";
	293	} else if (kind == thmc10) {
	294	type_name = "thmc10";
	295	} else if (kind == lm84) {
	296	type_name = "lm84";
	297	} else if (kind == gl523sm) {
	298	type_name = "gl523sm";
	299	} else if (kind == mc1066) {
	300	type_name = "mc1066";
	301	}
c83c41e4 KH	302	pr_debug("adm1021: Detected chip %s at adapter %d, address 0x%02x.\n",
c83c41e4 KH	303	type_name, i2c_adapter_id(adapter), address);
1da177e4	304
c83c41e4 KH	305	/* Fill in the remaining client fields */
c83c41e4 KH	306	strlcpy(client->name, type_name, I2C_NAME_SIZE);
1da177e4	307	data->type = kind;
9a61bf63	308	mutex_init(&data->update_lock);
1da177e4 LT	309
1da177e4 LT	310	/* Tell the I2C layer a new client has arrived */
c83c41e4	311	if ((err = i2c_attach_client(client)))
1da177e4 LT	312	goto error1;
	313
	314	/* Initialize the ADM1021 chip */
c83c41e4 KH	315	if (kind != lm84 && !read_only)
c83c41e4 KH	316	adm1021_init_client(client);
1da177e4 LT	317
1da177e4 LT	318	/* Register sysfs hooks */
c83c41e4	319	if ((err = sysfs_create_group(&client->dev.kobj, &adm1021_group)))
681c6f7a MH	320	goto error2;
681c6f7a MH	321
1beeffe4 TJ	322	data->hwmon_dev = hwmon_device_register(&client->dev);
	323	if (IS_ERR(data->hwmon_dev)) {
	324	err = PTR_ERR(data->hwmon_dev);
681c6f7a	325	goto error3;
943b0830 MH	326	}
943b0830 MH	327
1da177e4 LT	328	return 0;
1da177e4 LT	329
681c6f7a	330	error3:
c83c41e4	331	sysfs_remove_group(&client->dev.kobj, &adm1021_group);
943b0830	332	error2:
c83c41e4	333	i2c_detach_client(client);
1da177e4 LT	334	error1:
	335	kfree(data);
	336	error0:
	337	return err;
	338	}
	339
	340	static void adm1021_init_client(struct i2c_client *client)
	341	{
	342	/* Enable ADC and disable suspend mode */
c83c41e4 KH	343	i2c_smbus_write_byte_data(client, ADM1021_REG_CONFIG_W,
c83c41e4 KH	344	i2c_smbus_read_byte_data(client, ADM1021_REG_CONFIG_R) & 0xBF);
1da177e4	345	/* Set Conversion rate to 1/sec (this can be tinkered with) */
c83c41e4	346	i2c_smbus_write_byte_data(client, ADM1021_REG_CONV_RATE_W, 0x04);
1da177e4 LT	347	}
	348
	349	static int adm1021_detach_client(struct i2c_client *client)
	350	{
943b0830	351	struct adm1021_data *data = i2c_get_clientdata(client);
1da177e4 LT	352	int err;
1da177e4 LT	353
1beeffe4	354	hwmon_device_unregister(data->hwmon_dev);
681c6f7a	355	sysfs_remove_group(&client->dev.kobj, &adm1021_group);
943b0830	356
7bef5594	357	if ((err = i2c_detach_client(client)))
1da177e4	358	return err;
1da177e4	359
943b0830	360	kfree(data);
1da177e4 LT	361	return 0;
	362	}
	363
1da177e4 LT	364	static struct adm1021_data adm1021_update_device(struct device dev)
	365	{
	366	struct i2c_client *client = to_i2c_client(dev);
	367	struct adm1021_data *data = i2c_get_clientdata(client);
	368
9a61bf63	369	mutex_lock(&data->update_lock);
1da177e4 LT	370
	371	if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
	372	\|\| !data->valid) {
	373	dev_dbg(&client->dev, "Starting adm1021 update\n");
	374
c83c41e4 KH	375	data->temp_input = i2c_smbus_read_byte_data(client,
	376	ADM1021_REG_TEMP);
	377	data->temp_max = i2c_smbus_read_byte_data(client,
	378	ADM1021_REG_TOS_R);
	379	data->temp_hyst = i2c_smbus_read_byte_data(client,
	380	ADM1021_REG_THYST_R);
	381	data->remote_temp_input = i2c_smbus_read_byte_data(client,
	382	ADM1021_REG_REMOTE_TEMP);
	383	data->remote_temp_max = i2c_smbus_read_byte_data(client,
	384	ADM1021_REG_REMOTE_TOS_R);
	385	data->remote_temp_hyst = i2c_smbus_read_byte_data(client,
	386	ADM1021_REG_REMOTE_THYST_R);
	387	data->alarms = i2c_smbus_read_byte_data(client,
	388	ADM1021_REG_STATUS) & 0x7c;
1da177e4	389	if (data->type == adm1023) {
c83c41e4 KH	390	data->remote_temp_prec =
	391	i2c_smbus_read_byte_data(client,
	392	ADM1023_REG_REM_TEMP_PREC);
	393	data->remote_temp_os_prec =
	394	i2c_smbus_read_byte_data(client,
	395	ADM1023_REG_REM_TOS_PREC);
	396	data->remote_temp_hyst_prec =
	397	i2c_smbus_read_byte_data(client,
	398	ADM1023_REG_REM_THYST_PREC);
	399	data->remote_temp_offset =
	400	i2c_smbus_read_byte_data(client,
	401	ADM1023_REG_REM_OFFSET);
	402	data->remote_temp_offset_prec =
	403	i2c_smbus_read_byte_data(client,
	404	ADM1023_REG_REM_OFFSET_PREC);
1da177e4 LT	405	}
	406	data->last_updated = jiffies;
	407	data->valid = 1;
	408	}
	409
9a61bf63	410	mutex_unlock(&data->update_lock);
1da177e4 LT	411
	412	return data;
	413	}
	414
	415	static int __init sensors_adm1021_init(void)
	416	{
	417	return i2c_add_driver(&adm1021_driver);
	418	}
	419
	420	static void __exit sensors_adm1021_exit(void)
	421	{
	422	i2c_del_driver(&adm1021_driver);
	423	}
	424
	425	MODULE_AUTHOR ("Frodo Looijaard <frodol@dds.nl> and "
	426	"Philip Edelbrock <phil@netroedge.com>");
	427	MODULE_DESCRIPTION("adm1021 driver");
	428	MODULE_LICENSE("GPL");
	429
	430	module_param(read_only, bool, 0);
	431	MODULE_PARM_DESC(read_only, "Don't set any values, read only mode");
	432
	433	module_init(sensors_adm1021_init)
	434	module_exit(sensors_adm1021_exit)